Whenever Horatio Caine or any of the CS Is are around kids, they show the best part of themselves when they are comforting the children that are usually attributed. Especially when a certain pedophilic villain from early on in the series makes appearances.
The brotherly bond between Horatio and Eric, even before Horatio became his in-law by being with his sister.
Horatio's Sunglasses are a gift from Delko after he first comes into the CS Is. he's worn them in almost EVERY episode.